Hammada al
Hamra 237

This meteorite has a high metal content of ~57 vol%. Other constituents
are chondrules and silicate fragments. One CAI has been observed.
Classification and analysis (J. Zipfel, MPI): Bulk composition: 69.6 wt%
Fe, 2.48 ppm Ir, 0.14 ppm Au, 4.42 wt% Mg, 4.67 ppm Sc; for further
details on grouping this meteorite with CH chondrites, see Zipfel et al.
(1998a). Weisberg et al. (1998) group this meteorite with Bencubbin.

HaH 237 is one of the rarest and most beautiful of
the Bencubbinites. It was a single complete piece weighing 3.17
kilograms. Virtually all of the meteorite has been exchanged with
museums and sold to collectors. I know the owner of the main mass, and
he is not going to cut any more of the meteorite. This means that the
price will rise, and there will be little material available in the
future.

Click the link below to read a PDF
file that describes the suspected formation of the CB and CH meteorites
in a solar nebula.